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Atomic layer deposition of ZnO/TiO2 nanolaminates as ultra-long life anode material for lithium-ion batteries.


ABSTRACT: In this work, we designed ZnO/TiO2 nanolaminates by atomic layer deposition (ALD) as anode material for lithium ion batteries. ZnO/TiO2 nanolaminates were fabricated on copper foil by depositing unit of 26 cycles ZnO/26 cycles TiO2 repeatedly using ALD. ZnO/TiO2 nanolaminates are much more stable than pristine ZnO films during electrochemical cycling process. Therefore, ZnO/TiO2 nanolaminates exhibit excellent lithium storage performance with an improved cycling performance and superior rate capability compared to pristine ZnO films. Moreover, coulombic efficiency (CE) of ZnO/TiO2 nanolaminates is above 99%, which is much higher than the value of pristine ZnO films. Excellent ultralong-life performance is gained for ZnO/TiO2 nanolaminates, retaining a reversible capacity of ~667 mAh g-1 within cut-off voltage of 0.05-2.5?V after 1200 cycles of charge-discharge at 500?mA?g-1. Constructing nanolaminates structures via ALD might open up new opportunities for improving the performance of anode materials with large volume expansion in lithium ion batteries.

SUBMITTER: Cao YQ 

PROVIDER: S-EPMC6687889 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature

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Atomic layer deposition of ZnO/TiO<sub>2</sub> nanolaminates as ultra-long life anode material for lithium-ion batteries.

Cao Yan-Qiang YQ   Wang Shan-Shan SS   Liu Chang C   Wu Di D   Li Ai-Dong AD  

Scientific reports 20190808 1


In this work, we designed ZnO/TiO<sub>2</sub> nanolaminates by atomic layer deposition (ALD) as anode material for lithium ion batteries. ZnO/TiO<sub>2</sub> nanolaminates were fabricated on copper foil by depositing unit of 26 cycles ZnO/26 cycles TiO<sub>2</sub> repeatedly using ALD. ZnO/TiO<sub>2</sub> nanolaminates are much more stable than pristine ZnO films during electrochemical cycling process. Therefore, ZnO/TiO<sub>2</sub> nanolaminates exhibit excellent lithium storage performance wit  ...[more]

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